Patent
Copper compound of substantive orthooxyazo dyestuff and process of making same.
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The article was published on 1915-11-04. It has received 7 citations till now.read more
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Tris and polyazo dyes from tetrazotized 0:0' dihydroxybenzidine
TL;DR: In this article, the present invention is concerned with valuable new tris-and poly-azo-dyestuffs, and a process for preparing the same, and is particularly concerned with direct dyeing cotton dyestuffs.
Patent
Metallized benzimidazole azo dyestuffs
TL;DR: In this paper, the metal complexes of azo dyestuffs with metals of atomic weight from 52-64, represented by the following formula: NH in which R is hydrogen, mononuclear aryl or lower alkyl and A is the residue of a diazotized residue.
Patent
Disazo dye from dihydroxy benzidine and process therefor
Hans Mayer,Willy Widmer +1 more
TL;DR: In this paper, the first asymmetrical disazo-dyestuffs were made by coupling tetrazottsed 8:8'-dihydroxy-4:4'-dlaminodiphensy with coupling components, and conducting the first coupling operation in a reaction medium having a pH value ranging from that of an acetic acid medium to...
Patent
Metallizable benzimidazole azo dyestuffs
TL;DR: In this article, the authors introduced metallizable azo dyestuffs having lake-forming groups ortho to the azo group derived from 5-hydroxy-benzimidazoles.
Patent
Process for the manufacture of asymmetrical polyazo-dyestuffs
Hans Mayer,Willy Widmer +1 more
TL;DR: In this paper, valuable polyazodyestuffs are made by coupling a diazo-compound obtainable from 1 molecular proportion of tetrazotized 3:3'-dihydroxy-4:4' -diaminodiphenyl and 1 molecular component containing a sulfonic acid group with a coupling component.